在 CV StreamReader (C#) 期间将字符串转换为 DateTime

Question

在 StreamReader:

期间，我遇到了将字符串转换为日期的问题

string line;
StreamReader sr = new StreamReader(file.ToString());
while ((line = sr.ReadLine()) != null)
{
 string col13 = line.Split(',')[13]; //"22/06/2014 00:00:00"    
}

我试过下面的代码但出现错误：

DateTime x = DateTime.Parse(col13); 
//or
DateTime y = Convert.ToDateTime(col13);
//System.FormatException: 'String was not recognized as a valid DateTime.'

CultureInfo culture = new CultureInfo("en-US");
DateTime tempDate = Convert.ToDateTime(col13, culture);
//System.FormatException: 'String was not recognized as a valid DateTime.'

DateTime y = DateTime.ParseExact(col13, "dd/mm/yyyy hh:mm:ss", CultureInfo.InvariantCulture);
//System.FormatException: 'DateTime pattern 'm' appears more than once with different values.'

Answer 1

在 DateTime.ParseExact() 格式中，使用 MM

而不是 mm

来自 MSDN，

MM

The "MM" custom format specifier represents the month as a number from 01 through 12

mm

The "mm" custom format specifier represents the minute as a number from 00 through 59.

所以，您的 DateTime.ParseExact() 将是

DateTime y = DateTime.ParseExact(col13, "dd/MM/yyyy HH:mm:ss", CultureInfo.InvariantCulture);
                                          //^^      ^^ This needs to update

在 CV StreamReader (C#) 期间将字符串转换为 DateTime

String to DateTime convert during CV StreamReader (C#)

c#

date

datetime

type-conversion

datetime-conversion